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Which consequence results when mismatched lens alignment causes birefringence?

A)Image contrast is reduced greatly.
B)Beam path remains unaffected centrally.
C)Focal length increases slightly overall.
D)Aberrations remain fully automatically corrected.

💡 Explanation

Reduced contrast occurs because the **polarization rotation** induced by birefringence varies across the lens aperture, therefore some light is blocked rather than passed, because light transmission isn't consistent; beam path shifts happen with prism effects.

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